Effect of NH 4HF 2 on deposition of alkaline electroless Ni-P coatings as a chromium-free pre-treatment for magnesium

A. A. Zuleta; E. Correa; M. Sepúlveda; L. Guerra; J. G. Castaño; F. Echeverría; P. Skeldon; G. E. Thompson

doi:10.1016/j.corsci.2011.10.028

Effect of NH 4HF 2 on deposition of alkaline electroless Ni-P coatings as a chromium-free pre-treatment for magnesium

A. A. Zuleta, E. Correa, M. Sepúlveda, L. Guerra, J. G. Castaño, F. Echeverría, P. Skeldon, G. E. Thompson

Research output: Contribution to journal › Article › peer-review

Abstract

An alkaline electroless treatment that forms a low-phosphorus Ni-P coating on magnesium is described. The treatment is shown to provide a suitable base for deposition of a high-phosphorus, electroless nickel coating using a slightly acidic bath. The composition of the alkaline bath was selected to limit the corrosion of the substrate during coating and to avoid the utilization of chromate ions or hydrofluoric acid. An optimal amount of NH 4HF 2 is identified that provides a relatively thin Ni-P coating, with the subsequently-deposited, high-phosphorus coating enhancing the corrosion resistance of the magnesium in sodium chloride solution. © 2011 Elsevier Ltd.

Original language	English
Pages (from-to)	194-200
Number of pages	6
Journal	Corrosion Science
Volume	55
DOIs	https://doi.org/10.1016/j.corsci.2011.10.028
Publication status	Published - Feb 2012

Keywords

A. Magnesium
A. Metal coating
B. Polarization
B. SEM
C. Kinetic parameters

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10.1016/j.corsci.2011.10.028

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title = "Effect of NH 4HF 2 on deposition of alkaline electroless Ni-P coatings as a chromium-free pre-treatment for magnesium",

abstract = "An alkaline electroless treatment that forms a low-phosphorus Ni-P coating on magnesium is described. The treatment is shown to provide a suitable base for deposition of a high-phosphorus, electroless nickel coating using a slightly acidic bath. The composition of the alkaline bath was selected to limit the corrosion of the substrate during coating and to avoid the utilization of chromate ions or hydrofluoric acid. An optimal amount of NH 4HF 2 is identified that provides a relatively thin Ni-P coating, with the subsequently-deposited, high-phosphorus coating enhancing the corrosion resistance of the magnesium in sodium chloride solution. {\textcopyright} 2011 Elsevier Ltd.",

keywords = "A. Magnesium, A. Metal coating, B. Polarization, B. SEM, C. Kinetic parameters",

author = "Zuleta, {A. A.} and E. Correa and M. Sep{\'u}lveda and L. Guerra and Casta{\~n}o, {J. G.} and F. Echeverr{\'i}a and P. Skeldon and Thompson, {G. E.}",

year = "2012",

month = feb,

doi = "10.1016/j.corsci.2011.10.028",

language = "English",

volume = "55",

pages = "194--200",

journal = "Corrosion Science",

issn = "1879-0496",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Effect of NH 4HF 2 on deposition of alkaline electroless Ni-P coatings as a chromium-free pre-treatment for magnesium

AU - Zuleta, A. A.

AU - Correa, E.

AU - Sepúlveda, M.

AU - Guerra, L.

AU - Castaño, J. G.

AU - Echeverría, F.

AU - Skeldon, P.

AU - Thompson, G. E.

PY - 2012/2

Y1 - 2012/2

N2 - An alkaline electroless treatment that forms a low-phosphorus Ni-P coating on magnesium is described. The treatment is shown to provide a suitable base for deposition of a high-phosphorus, electroless nickel coating using a slightly acidic bath. The composition of the alkaline bath was selected to limit the corrosion of the substrate during coating and to avoid the utilization of chromate ions or hydrofluoric acid. An optimal amount of NH 4HF 2 is identified that provides a relatively thin Ni-P coating, with the subsequently-deposited, high-phosphorus coating enhancing the corrosion resistance of the magnesium in sodium chloride solution. © 2011 Elsevier Ltd.

AB - An alkaline electroless treatment that forms a low-phosphorus Ni-P coating on magnesium is described. The treatment is shown to provide a suitable base for deposition of a high-phosphorus, electroless nickel coating using a slightly acidic bath. The composition of the alkaline bath was selected to limit the corrosion of the substrate during coating and to avoid the utilization of chromate ions or hydrofluoric acid. An optimal amount of NH 4HF 2 is identified that provides a relatively thin Ni-P coating, with the subsequently-deposited, high-phosphorus coating enhancing the corrosion resistance of the magnesium in sodium chloride solution. © 2011 Elsevier Ltd.

KW - A. Magnesium

KW - A. Metal coating

KW - B. Polarization

KW - B. SEM

KW - C. Kinetic parameters

U2 - 10.1016/j.corsci.2011.10.028

DO - 10.1016/j.corsci.2011.10.028

M3 - Article

SN - 1879-0496

VL - 55

SP - 194

EP - 200

JO - Corrosion Science

JF - Corrosion Science

ER -

Effect of NH 4HF 2 on deposition of alkaline electroless Ni-P coatings as a chromium-free pre-treatment for magnesium

Abstract

Keywords

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